Skip the auto shop - Our mechanics make house calls

Q: When vehicle getting hot it starts to idle higher to 1200 rpm

asked by on

My Ford battam 2005 13 idle higher as it getting hot. Idling starts at 1000rpm and go up to 1200

My car has 120000 miles.
My car has a manual transmission.

Hey there. This may be a sign of a failing idle air control valve. The idle air control valve is located on or near your intake manifold that monitors the air intake as it is mixed with fuel prior to being injected into the engine. This valve is controlled by the vehicle’s computer which will adjust idle speed based upon other measurements such as engine temperature, intake air temperature and electrical system load or voltage. When you accelerate, the engine RPM increases, and as you let off the gas, the RPM slowly returns to the normal idling speed.

However, when the engine RPM drops below the normal range of 800 RPM (for most cars), it is more than likely that you are dealing with an IAC valve problem. In cases where this valve is clogged or is failing, your vehicle will stall instead of slowing to an idle after the release of the throttle. This may also be related to a cold start enrichment issue as well. When the engine intake air temperature reaches a certain level of heat, the computer will automatically change the air/fuel mixture to adapt to this change in air density. I would recommend having an expert from YourMechanic come to your home to replace your idle air control valve.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Truck developed idling problem - 1980 Ford F-100

Check the cap and rotor of the distributor. Wear and corrosion inside this component can cause many idling issues and misfires. Disconnect the coil and leave the cap off and observe the rotor spinning while having someone crank the vehicle...

Q: 1995 f150 shaking during idle and shaking and jumping during acceleration

If the vehicle only starts to shake when getting above 35 then you may have transmission clutch or torque converter problems. Try to turn off overdrive and see if shudder goes away when driving and if it does then problem...

Q: How to fix my torque converter clutch when it's

Hey there. If you are getting Diagnostic Trouble Code P0740, that means there is a fault in the torque converter clutch circuit, which includes the solenoid malfunction. The solenoid itself (it's a solenoid, not a sensor) has to be...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...